121212221001211 has 2 divisors, whose sum is σ = 121212221001212. Its totient is φ = 121212221001210.

The previous prime is 121212221001149. The next prime is 121212221001217. The reversal of 121212221001211 is 112100122212121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (112100122212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121212221001211 - 2⁷ = 121212221001083 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212221001217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606110500605 + 60606110500606.

It is an arithmetic number, because the mean of its divisors is an integer number (60606110500606).

Almost surely, 2^{121212221001211} is an apocalyptic number.

121212221001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212221001211 is an equidigital number, since it uses as much as digits as its factorization.

121212221001211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121212221001211 its reverse (112100122212121), we get a palindrome (233312343213332).

The spelling of 121212221001211 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, one thousand, two hundred eleven".